Admission-valve for gas-engines.



No. 870,125. PATENTED NOV. 5, 1907.

G. B. PETSGHE.

ADMISSION VALVE FOR GAS ENGINES.

APPLIOATION FILED JANA), 1905.

' ATTORNEY.

UNITED STAEES' PATENT OFFICE.

DRY & MACHINE COMPANY, PENNSYLVAXIA.

Application filed January 9. 1905. Serial No. 240.153.

To all whom it may concern:

Be it known that I, GUSTAV B. Parsons, a subject of-the Emperor of Germany, residing in the city and ADMISSIOLLVALVE F01} GAS-ENGINES.

- Specification of Letters Patent.

OF PHILADELPHIA,- PENNSYLVANIA, A G ORPORATION OF Patented Nov. 5, 1907.

and working on the valve seated port K, this valve having a sleeved stem L which extends up through the in Admission-Valves for Gas-Engines, of which the Iolf lowing is a true and exact description, reference being f had to the accompanying drawings, which form a part thereof.

tion of admission valves for gas engines, and has for its object to provide a simple and effective valve apparatus for this purpose. I

The nature of my invention will be best understood as described in connection with the drawings in which it is illustrated and in which v Figure 1, is aside elevation of a gas engine cylinder -equipped with my improved admission valves. .Fig. 2, is a cross-sectional view through one end of the cylinder and through the admis ion and exhaust valves.

taken on the line 22, of Fig. 2, and Fig. 3, is an enlarged view showing the clearance preferably provided for between the slide block and its actuating segment for purposes which will be described.

A indicates thebase supporting the cylinder B. B B are standards supported on the cylinder, as

shown, and B B brackets also supported on the cyli inder.

O, and C indicate the admis ion valves, D and D'-, the exhaust valves. l

E, E, are guidessupported on the brackets B and are provided with parallel guidewaysindicated at E,

extending bearings E E, which support the pivots indicatedat E Ef, etc.-

F, and F are pivoted rock levers working on the front row of cams. G, and G", similar levers working on the rear row of coins, these levers being pivoted on the pivots E, as shown. I i

H, and H are reciprocating rods driven by mechanism connected with the engine and not shown in the drawings, these rods being secured to and moving the cam blocks H, H, one set of which moves in the guide ways E, and the other set in the guideways E the tion to the levers F, and F and G,'G at proper times. 7

Referring now to the admis ion valves indicated in Fig. l at C, and these valves have casings K, which are divided by the partition indicated at K, into air chambers K and g. s chambers K the outlet port of the air chamber into the cylinder being indicated at K and the outletport of the gas chamber being form ed just above the port- K as indicated at K. L, is a valve adapted to regulate the admission of gas My invention relates to the construction and opera- V I casing as shown and through which passcsthe stem .\I. county of Philadelphia, in the State of Pennsylvania.

5 have invented certain new and useful Improvements f port K and which valve I will refer to as the main I-I the valve M. which is adapted to open and close the admission valve. Valve M. is actuated through its stem M. by a rock lever N, pivoted on one of the standards B and coupled through a head N. and connecting rod X with oneof the cam actuated rock levers already described. As shown the front admis ion valve is actuated by a cam in the front row through the rock lever F 1 and the other admission valve is actuated by cam in the rear row through the rock lever F The other two ing the valves as shown and already described forms the subject matter of my application for Letters Patent filed December 30th. 1904, Serial Xumber 238,917, while the special construction illustrated for the exhaust valves.

forms the subject, matter of my other application filed March 7th, 1906, Serial X umber 304,026.

Referring again to the admission valve construction, it will be seen that the sleeved stem L, is attached at its top to the free end of a lever O, pivoted to the standard B at O, and that this lever is connected through a link 0' and slide block 0 with a slotted segment N secured on the rock lever N. and it. will also be seen in I the enlarged view. Fig. 3, that the slide block is so f coupled with the slotted segment as to have a certain crosswise freedom of motion therein, by preference an and E cam supporting blocks and also with upwardly 5 secured to a rock shaft 0, which can be adjusted by a governor or otherwise to vary the position of the slide block in the segment and consequently to vary the extent of opening of the valve L. I

In operation ..the valves being in the position shown in Fig. 2, the valve M, is held tight to its seat by-the 45 cam being properly formed and arranged to give mo-f will insure that the main valve 11, will always open in advance of the valve L, so t-hata certain amount of air is admitted to the cylinder before the gas and gas and,

air m'ntture is admitted thereto.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is,

1. In a gas engine an admission valve casing having an air admission port K opening into the cylinder through a valve seat K and a gas port K opening into the air port close to the seat K5, in combination with a main valve M adapted to seat itself on seat K and having an actuatti; stem M, extending through the casing, 21 valve L adapted to act on the mouth of the gas port and having a sleeve stem L, surrounding the stem M, of the main valve, a valve actuating lever connected to valve stem M, and a shitftable connection from sleeve L, to said lever whereby the lever also imparts motion to the gas valve and whereby such motion can be varied. r

2. In a gas engine an admission valve casing having an air admission port K opening into the cylinder through a valve seat it, and a gas port K opening into the air port close to the seat K in combination with a main valve 1L1, adapted to seat itself on seat K and having an actuaiingfstem M, extending through the casing, a valve L adapted to act on the mouth of the gas port and having a sleevestem' L, surrounding the stem M, of the main valve. a valve actuating lever connected to valve stem M, a shiftable connection from sleeve L, to said lever whereby the lever also imparts motion to the gas valve and whereby such motion can be varied, said connection being also of a character which permits a short movement of the main valve from its seat before the gas valve is opened, and a spring for holding the gas valve to its seat when the main valve is closed.

3. In a gas. engine an admission valve casing having an air admission port K opening'into the cylinder through a valve seat K and a gas port K, opening into the air port close to the seat K-Ziin combination with a main valve M adapted to seat itself on seat K, and having an actuating stem M, extending through the casing, a valve L adapted to act on the mouth of the gas port and having a sleeve s'tem L, surrounding the stem M, of the main valve, a valve actuating lever connected to valve stem M, said lever having attached to it a segment N, a lever 0, connected to the sleeve stem, a link and slide block'connecting lever O, with segment NE, the slide block forming a loose fit in the segment to permit a certain lost motion, a

spring acting to press lever O, in the direction to close the gas valve, and means for adjusting the slide block in the segment. 4

GUSTAV xB. PETSCHE.

Witnesses CHAS. Ft Mi'nns, D. STEWART. 

